package models

import (
	"cdam/lib"
	"errors"
	"fmt"
	"reflect"
	"strconv"
	"strings"
	"time"

	"github.com/astaxie/beego/orm"
)

type Position struct {
	Id         int           `orm:"column(id);pk"`
	Parentid   lib.NullInt64 `orm:"column(parentid);null"`
	Name       string        `orm:"column(name);null"`
	Code       string        `orm:"column(code);null"`
	Tenant     lib.NullInt64 `orm:"column(tenant);null"`
	Updatedate time.Time     `orm:"column(updatedate);type(date);null"`
	Updater    lib.NullInt64 `orm:"column(updater);null"`
	Createdate time.Time     `orm:"column(createdate);type(date);null"`
	Creater    lib.NullInt64 `orm:"column(creater);null"`
	Path       string        `orm:"column(path);null"`
}

func (t *Position) TableName() string {
	return "t_sys_position"
}

func init() {
	orm.RegisterModel(new(Position))
}

// AddTSysPosition insert a new TSysPosition into database and returns
// last inserted Id on success.
func AddPosition(m *Position) (id int64, err error) {
	o := orm.NewOrm()
	querySetter := o.QueryTable(m.TableName()).Filter("code", m.Code)
	if m.Tenant.Valid && m.Tenant.Int64 > 0 {
		querySetter.Filter("tenant", m.Tenant.Int64)
	}
	count, _ := querySetter.Count()
	if count > 0 {
		return 0, errors.New("同一租户的职位代码不能重复，请重新输入职位代码")
	} else {
		if m.Parentid.Valid {
			v := &Position{Id: int(m.Parentid.Int64)}
			if err = o.Read(v); err == nil {
				m.Path = v.Path + "_" + strconv.FormatInt(int64(v.Id), 10)
			}
		}
		id, err = o.Insert(m)
	}
	return
}

func GetAllPositionByTenant(tenantCode string) ([]*Position, error) {
	o := orm.NewOrm()
	qs := o.QueryTable(new(Position))
	if len(tenantCode) > 0 && tenantCode != "undefined" {
		qs = qs.Filter("tenant", tenantCode)
	} else {
		// qs = qs.Filter("1","1")
	}
	var result = []*Position{}
	_, err := qs.All(&result)
	if err != nil {
		return nil, err
	} else {
		return result, nil
	}
}

// GetTSysPositionById retrieves models.TSysPosition by Id. Returns error if
// Id doesn't exist
func GetPositionById(id int) (v *Position, err error) {
	o := orm.NewOrm()
	v = &Position{Id: id}
	if err = o.Read(v); err == nil {
		return v, nil
	}
	return nil, err
}

// GetAllTSysPosition retrieves all TSysPosition matches certain condition. Returns empty list if
// no records exist
func GetAllPosition(query map[string]string, fields []string, sortby []string, order []string,
	offset int64, limit int64) (ml []interface{}, err error) {
	o := orm.NewOrm()
	qs := o.QueryTable(new(Position))
	// query k=v
	for k, v := range query {
		// rewrite dot-notation to Object__Attribute
		k = strings.Replace(k, ".", "__", -1)
		if strings.Contains(k, "isnull") {
			qs = qs.Filter(k, (v == "true" || v == "1"))
		} else {
			qs = qs.Filter(k, v)
		}
	}
	// order by:
	var sortFields []string
	if len(sortby) != 0 {
		if len(sortby) == len(order) {
			// 1) for each sort field, there is an associated order
			for i, v := range sortby {
				orderby := ""
				if order[i] == "desc" {
					orderby = "-" + v
				} else if order[i] == "asc" {
					orderby = v
				} else {
					return nil, errors.New("Error: Invalid order. Must be either [asc|desc]")
				}
				sortFields = append(sortFields, orderby)
			}
			qs = qs.OrderBy(sortFields...)
		} else if len(sortby) != len(order) && len(order) == 1 {
			// 2) there is exactly one order, all the sorted fields will be sorted by this order
			for _, v := range sortby {
				orderby := ""
				if order[0] == "desc" {
					orderby = "-" + v
				} else if order[0] == "asc" {
					orderby = v
				} else {
					return nil, errors.New("Error: Invalid order. Must be either [asc|desc]")
				}
				sortFields = append(sortFields, orderby)
			}
		} else if len(sortby) != len(order) && len(order) != 1 {
			return nil, errors.New("Error: 'sortby', 'order' sizes mismatch or 'order' size is not 1")
		}
	} else {
		if len(order) != 0 {
			return nil, errors.New("Error: unused 'order' fields")
		}
	}

	var l []Position
	qs = qs.OrderBy(sortFields...)
	if _, err = qs.Limit(limit, offset).All(&l, fields...); err == nil {
		if len(fields) == 0 {
			for _, v := range l {
				ml = append(ml, v)
			}
		} else {
			// trim unused fields
			for _, v := range l {
				m := make(map[string]interface{})
				val := reflect.ValueOf(v)
				for _, fname := range fields {
					m[fname] = val.FieldByName(fname).Interface()
				}
				ml = append(ml, m)
			}
		}
		return ml, nil
	}
	return nil, err
}

// UpdateTSysPosition updates TSysPosition by Id and returns error if
// the record to be updated doesn't exist
func UpdatePositionById(m *Position) (err error) {
	o := orm.NewOrm()
	v := Position{Id: m.Id}
	// ascertain id exists in the database
	if err = o.Read(&v); err == nil {
		var num int64
		querysetter := o.QueryTable(m.TableName()).Filter("code", v.Code)
		if m.Tenant.Valid && m.Tenant.Int64 > 0 {
			querysetter = querysetter.Filter("tenant", m.Tenant.Int64)
		}
		querysetter = querysetter.Exclude("id", m.Id)
		count, _ := querysetter.Count()
		if count > 0 {
			return errors.New("同一租户的职位代码重复，请重新填写职位代码")
		} else {
			if m.Parentid.Valid {
				v := &Position{Id: int(m.Parentid.Int64)}
				if err = o.Read(v); err == nil {
					m.Path = v.Path + "_" + strconv.FormatInt(int64(v.Id), 10)
				}
			}
			if num, err = o.Update(m); err == nil {
				fmt.Println("Number of records updated in database:", num)
			}
		}
	}
	return
}

// DeleteTSysPosition deletes TSysPosition by Id and returns error if
// the record to be deleted doesn't exist
func DeletePosition(id int) (err error) {
	o := orm.NewOrm()
	v := Position{Id: id}
	// ascertain id exists in the database
	if err = o.Read(&v); err == nil {
		var num int64
		if num, err = o.Delete(&Position{Id: id}); err == nil {
			fmt.Println("Number of records deleted in database:", num)
		}
	}
	return
}
